diff --git a/tracing-attributes/Cargo.toml b/tracing-attributes/Cargo.toml
index 3b6ce3dc27..5d43956343 100644
--- a/tracing-attributes/Cargo.toml
+++ b/tracing-attributes/Cargo.toml
@@ -35,7 +35,7 @@ proc-macro = true
 
 [dependencies]
 proc-macro2 = "1"
-syn = { version = "1", default-features = false, features = ["full", "parsing", "printing", "visit", "visit-mut", "clone-impls", "extra-traits", "proc-macro"] }
+syn = { version = "1.0.43", default-features = false, features = ["full", "parsing", "printing", "visit", "visit-mut", "clone-impls", "extra-traits", "proc-macro"] }
 quote = "1"
 
 [dev-dependencies]